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      <a href="/2017/01/26/react-redux-notes-8-use-css-transition/" title="React-Redux使用笔记8--使用CSS过渡动画" itemprop="url">React-Redux使用笔记8--使用CSS过渡动画</a>
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      <a href="https://godbasin.github.io" title="被删">被删</a>
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    <time datetime="2017-01-26T15:10:55.000Z" itemprop="datePublished">2017-01-26</time>
    更新日期:<time datetime="2018-12-18T15:34:58.392Z" itemprop="dateModified">2018-12-18</time>
    
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			<strong class="toc-title">文章目录</strong>
		<ol class="toc"><li class="toc-item toc-level-2"><a class="toc-link" href="#React动画"><span class="toc-number">1.</span> <span class="toc-text">React动画</span></a><ol class="toc-child"><li class="toc-item toc-level-3"><a class="toc-link" href="#ReactCSSTransitionGroup：高级API"><span class="toc-number">1.1.</span> <span class="toc-text">ReactCSSTransitionGroup：高级API</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#ReactTransitionGroup：底层API"><span class="toc-number">1.2.</span> <span class="toc-text">ReactTransitionGroup：底层API</span></a></li></ol></li><li class="toc-item toc-level-2"><a class="toc-link" href="#给SidebarList添加动画"><span class="toc-number">2.</span> <span class="toc-text">给SidebarList添加动画</span></a><ol class="toc-child"><li class="toc-item toc-level-3"><a class="toc-link" href="#安装React动画插件"><span class="toc-number">2.1.</span> <span class="toc-text">安装React动画插件</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#添加CSS样式"><span class="toc-number">2.2.</span> <span class="toc-text">添加CSS样式</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#在SidebarList组件添加"><span class="toc-number">2.3.</span> <span class="toc-text">在SidebarList组件添加</span></a></li></ol></li><li class="toc-item toc-level-2"><a class="toc-link" href="#给HomeContainer组件添加路由过渡动画"><span class="toc-number">3.</span> <span class="toc-text">给HomeContainer组件添加路由过渡动画</span></a><ol class="toc-child"><li class="toc-item toc-level-3"><a class="toc-link" href="#添加CSS样式-1"><span class="toc-number">3.1.</span> <span class="toc-text">添加CSS样式</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#在HomeContainer组件添加"><span class="toc-number">3.2.</span> <span class="toc-text">在HomeContainer组件添加</span></a></li></ol></li><li class="toc-item toc-level-2"><a class="toc-link" href="#结束语"><span class="toc-number">4.</span> <span class="toc-text">结束语</span></a></li></ol>
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		<p>最近又重新拾起了React框架，并配合开源模板gentelella以及Redux建立了个简单的项目。《React-Redux使用笔记》系列用于记录过程中的一些使用和解决方法。<br>本文记录在SidebarList组件中使用CSS过渡动画的过程。<br><a id="more"></a></p>
<h2 id="React动画"><a href="#React动画" class="headerlink" title="React动画"></a>React动画</h2><hr>
<p>React为动画提供一个ReactTransitonGroup插件组件作为一个底层的API，一个ReactCSSTransitionGroup来简单地实现基本的CSS动画和过渡。</p>
<h3 id="ReactCSSTransitionGroup：高级API"><a href="#ReactCSSTransitionGroup：高级API" class="headerlink" title="ReactCSSTransitionGroup：高级API"></a>ReactCSSTransitionGroup：高级API</h3><p>ReactCSSTransitionGroup是基于ReactTransitionGroup的，在React组件进入或者离开DOM的时候，它是一种简单地执行CSS过渡和动画的方式。</p>
<p>ReactCSSTransitionGroup是ReactTransitions的接口。这是一个简单的元素，包含了所有你对其动画感兴趣的组件。</p>
<p>注意： </p>
<ul>
<li>你必须为ReactCSSTransitionGroup的所有子级提供键属性，即使只渲染一项。这就是React确定哪一个子级插入了，移除了，或者停留在那里</li>
<li>为了能够给它的子级应用过渡效果，ReactCSSTransitionGroup必须已经挂载到了DOM</li>
</ul>
<p>可以给ReactCSSTransitionGroup添加<code>transitionEnter={false}</code>或者<code>transitionLeave={false}</code>props来禁用入场或者出场动画</p>
<h3 id="ReactTransitionGroup：底层API"><a href="#ReactTransitionGroup：底层API" class="headerlink" title="ReactTransitionGroup：底层API"></a>ReactTransitionGroup：底层API</h3><p>ReactTransitionGroup是动画的基础。它可以通过React.addons.TransitionGroup得到。<br>当子级被添加或者从其中移除的时候，特殊的生命周期函数就会在它们上面被调用。</p>
<ul>
<li><p>componentWillEnter(callback)</p>
<blockquote>
<p>在组件被添加到已有的TransitionGroup中的时候，该函数和componentDidMount()被同时调用。<br>这将会阻塞其它动画触发，直到callback被调用。<br>该函数不会在TransitionGroup初始化渲染的时候调用。</p>
</blockquote>
</li>
<li><p>componentDidEnter()</p>
<blockquote>
<p>该函数在传给componentWillEnter的callback函数被调用之后调用。</p>
</blockquote>
</li>
<li><p>componentWillLeave(callback)</p>
<blockquote>
<p>该函数在子级从ReactTransitionGroup中移除的时候调用。<br>虽然子级被移除了，ReactTransitionGroup将会使它继续在DOM中，直到callback被调用。</p>
</blockquote>
</li>
<li><p>componentDidLeave()</p>
<blockquote>
<p>该函数在willLeave callback被调用的时候调用（与componentWillUnmount是同一时间）。</p>
</blockquote>
</li>
</ul>
<p>虽然说底层的API我们较少会用到，但是其实从这些API就能了解到生命周期，以及相关的实现方式了呢。</p>
<h2 id="给SidebarList添加动画"><a href="#给SidebarList添加动画" class="headerlink" title="给SidebarList添加动画"></a>给SidebarList添加动画</h2><hr>
<h3 id="安装React动画插件"><a href="#安装React动画插件" class="headerlink" title="安装React动画插件"></a>安装React动画插件</h3><p>使用npm安装：<br><figure class="highlight plain"><table><tr><td class="gutter"><pre><div class="line">1</div></pre></td><td class="code"><pre><div class="line">npm install --save react-addons-transition-group react-addons-css-transition-group</div></pre></td></tr></table></figure></p>
<h3 id="添加CSS样式"><a href="#添加CSS样式" class="headerlink" title="添加CSS样式"></a>添加CSS样式</h3><p>我们在static/gentelella/build/css文件夹下，创建animation.css文件，并添加动画样式：<br><figure class="highlight css"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div><div class="line">14</div><div class="line">15</div><div class="line">16</div><div class="line">17</div><div class="line">18</div><div class="line">19</div></pre></td><td class="code"><pre><div class="line"><span class="selector-class">.slide-enter</span> &#123;</div><div class="line">    <span class="attribute">max-height</span>: <span class="number">0</span>;</div><div class="line">    <span class="attribute">overflow</span>: hidden;</div><div class="line">&#125;</div><div class="line"></div><div class="line"><span class="selector-class">.slide-enter</span><span class="selector-class">.slide-enter-active</span> &#123;</div><div class="line">    <span class="attribute">max-height</span>: <span class="number">100px</span>;</div><div class="line">    <span class="attribute">transition</span>: all <span class="number">300ms</span> ease-in-out;</div><div class="line">&#125;</div><div class="line"></div><div class="line"><span class="selector-class">.slide-leave</span> &#123;</div><div class="line">    <span class="attribute">max-height</span>: <span class="number">100px</span>;</div><div class="line">&#125;</div><div class="line"></div><div class="line"><span class="selector-class">.slide-leave</span><span class="selector-class">.slide-leave-active</span> &#123;</div><div class="line">    <span class="attribute">max-height</span>: <span class="number">0</span>;</div><div class="line">    <span class="attribute">overflow</span>: hidden;</div><div class="line">    <span class="attribute">transition</span>: all <span class="number">300ms</span> ease-in-out;</div><div class="line">&#125;</div></pre></td></tr></table></figure></p>
<p>我们使用设置max-height的方式来实现slide的动画效果。</p>
<h3 id="在SidebarList组件添加"><a href="#在SidebarList组件添加" class="headerlink" title="在SidebarList组件添加"></a>在SidebarList组件添加</h3><p>在SidebarList.jsx添加动画的使用：<br><figure class="highlight jsx"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div></pre></td><td class="code"><pre><div class="line"><span class="keyword">import</span> ReactCSSTransitionGroup <span class="keyword">from</span> <span class="string">'react-addons-css-transition-group'</span></div><div class="line"><span class="keyword">import</span> <span class="string">'../../../../static/gentelella/build/css/animation.css'</span></div><div class="line"></div><div class="line">&lt;ReactCSSTransitionGroup transitionName=<span class="string">"slide"</span> transitionEnterTimeout=&#123;<span class="number">300</span>&#125; transitionLeaveTimeout=&#123;<span class="number">300</span>&#125;&gt;</div><div class="line">    ... <span class="comment">// 子菜单内容</span></div><div class="line">&lt;<span class="regexp">/ReactCSSTransitionGroup&gt;</span></div></pre></td></tr></table></figure></p>
<h2 id="给HomeContainer组件添加路由过渡动画"><a href="#给HomeContainer组件添加路由过渡动画" class="headerlink" title="给HomeContainer组件添加路由过渡动画"></a>给HomeContainer组件添加路由过渡动画</h2><hr>
<h3 id="添加CSS样式-1"><a href="#添加CSS样式-1" class="headerlink" title="添加CSS样式"></a>添加CSS样式</h3><p>我们在animation.css文件添加动画样式：<br><figure class="highlight css"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div></pre></td><td class="code"><pre><div class="line"><span class="selector-class">.fade-enter</span> &#123;</div><div class="line">    <span class="attribute">opacity</span>: <span class="number">0.01</span>;</div><div class="line">    <span class="attribute">transition</span>: opacity <span class="number">100ms</span> ease-in;</div><div class="line">&#125;</div><div class="line"></div><div class="line"><span class="selector-class">.fade-enter</span><span class="selector-class">.fade-enter-active</span> &#123;</div><div class="line">    <span class="attribute">opacity</span>: <span class="number">1</span>;</div><div class="line">&#125;</div></pre></td></tr></table></figure></p>
<p>因为react动画的淡入淡出使用的时候，会存在两个元素同时出现在页面中的情况，所以此处为了方便，本骚年就把离场动画关掉啦。</p>
<h3 id="在HomeContainer组件添加"><a href="#在HomeContainer组件添加" class="headerlink" title="在HomeContainer组件添加"></a>在HomeContainer组件添加</h3><p>在HomeContainer.jsx添加动画的使用：<br><figure class="highlight jsx"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div></pre></td><td class="code"><pre><div class="line"><span class="keyword">import</span> ReactCSSTransitionGroup <span class="keyword">from</span> <span class="string">'react-addons-css-transition-group'</span></div><div class="line"><span class="keyword">import</span> <span class="string">'../../../static/gentelella/build/css/animation.css'</span></div><div class="line"></div><div class="line">&lt;ReactCSSTransitionGroup transitionName=<span class="string">"fade"</span> transitionEnterTimeout=&#123;<span class="number">200</span>&#125; transitionLeave=&#123;<span class="literal">false</span>&#125;&gt;</div><div class="line">    <span class="xml"><span class="tag">&lt;<span class="name">div</span> <span class="attr">key</span>=<span class="string">&#123;this.props.location.pathname&#125;</span>&gt;</span>&#123;that.props.children&#125;<span class="tag">&lt;/<span class="name">div</span>&gt;</span></span></div><div class="line">&lt;<span class="regexp">/ReactCSSTransitionGroup&gt;</span></div></pre></td></tr></table></figure></p>
<p>这里需要注意的是，为了使子路由过渡可用，我们需要给其添加一个独一无二的key，这里我们使用location.pathname来作为这个key。</p>
<h2 id="结束语"><a href="#结束语" class="headerlink" title="结束语"></a>结束语</h2><hr>
<p>本节简单举例介绍了下React中CSS动画过渡效果，其实关于路由切换同时存在两个组件的问题，我们也可以调用底层API去处理，小伙伴们下去也可以自己研究一下呗。<br><a href="https://github.com/godbasin/godbasin.github.io/tree/blog-codes/react-redux-notes/8-use-css-transition" target="_blank" rel="external">此处查看项目代码</a><br><a href="http://react-redux-notes.godbasin.com/8-use-css-transition/index.html" target="_blank" rel="external">此处查看页面效果</a></p>
  
		
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	<p style="text-align: center;margin-top: 10px;margin-bottom: 20px;">码生艰难，写文不易，给我家猪囤点猫粮了喵~</p>
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  		<p>作者：被删</p>
  		<p>出处：<a href="https://godbasin.github.io">https://godbasin.github.io</a></p>
  		<p>本文版权归作者所有，欢迎转载，但未经作者同意必须保留此段声明，且在文章页面明显位置给出原文连接，否则保留追究法律责任的权利。</p>
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  <strong class="toc-title">文章目录</strong>
  <ol class="toc"><li class="toc-item toc-level-2"><a class="toc-link" href="#React动画"><span class="toc-number">1.</span> <span class="toc-text">React动画</span></a><ol class="toc-child"><li class="toc-item toc-level-3"><a class="toc-link" href="#ReactCSSTransitionGroup：高级API"><span class="toc-number">1.1.</span> <span class="toc-text">ReactCSSTransitionGroup：高级API</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#ReactTransitionGroup：底层API"><span class="toc-number">1.2.</span> <span class="toc-text">ReactTransitionGroup：底层API</span></a></li></ol></li><li class="toc-item toc-level-2"><a class="toc-link" href="#给SidebarList添加动画"><span class="toc-number">2.</span> <span class="toc-text">给SidebarList添加动画</span></a><ol class="toc-child"><li class="toc-item toc-level-3"><a class="toc-link" href="#安装React动画插件"><span class="toc-number">2.1.</span> <span class="toc-text">安装React动画插件</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#添加CSS样式"><span class="toc-number">2.2.</span> <span class="toc-text">添加CSS样式</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#在SidebarList组件添加"><span class="toc-number">2.3.</span> <span class="toc-text">在SidebarList组件添加</span></a></li></ol></li><li class="toc-item toc-level-2"><a class="toc-link" href="#给HomeContainer组件添加路由过渡动画"><span class="toc-number">3.</span> <span class="toc-text">给HomeContainer组件添加路由过渡动画</span></a><ol class="toc-child"><li class="toc-item toc-level-3"><a class="toc-link" href="#添加CSS样式-1"><span class="toc-number">3.1.</span> <span class="toc-text">添加CSS样式</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#在HomeContainer组件添加"><span class="toc-number">3.2.</span> <span class="toc-text">在HomeContainer组件添加</span></a></li></ol></li><li class="toc-item toc-level-2"><a class="toc-link" href="#结束语"><span class="toc-number">4.</span> <span class="toc-text">结束语</span></a></li></ol>
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